fix podman generate kube with HostAliases

Signed-off-by: zhangguanzhang <zhangguanzhang@qq.com>

libpod/kube.go

@@ -48,12 +48,22 @@ func (p *Pod) GenerateForKube() (*v1.Pod, []v1.ServicePort, error) {
 		return nil, servicePorts, errors.Errorf("pod %s only has an infra container", p.ID())
 	}
 
+	extraHost := make([]v1.HostAlias, 0)
 	if p.HasInfraContainer() {
 		infraContainer, err := p.getInfraContainer()
 		if err != nil {
 			return nil, servicePorts, err
 		}
-
+		for _, host := range infraContainer.config.ContainerNetworkConfig.HostAdd {
+			hostSli := strings.SplitN(host, ":", 2)
+			if len(hostSli) != 2 {
+				return nil, servicePorts, errors.New("invalid hostAdd")
+			}
+			extraHost = append(extraHost, v1.HostAlias{
+				IP:        hostSli[1],
+				Hostnames: []string{hostSli[0]},
+			})
+		}
 		ports, err = ocicniPortMappingToContainerPort(infraContainer.config.PortMappings)
 		if err != nil {
 			return nil, servicePorts, err
@@ -61,7 +71,11 @@ func (p *Pod) GenerateForKube() (*v1.Pod, []v1.ServicePort, error) {
 		servicePorts = containerPortsToServicePorts(ports)
 	}
 	pod, err := p.podWithContainers(allContainers, ports)
-	return pod, servicePorts, err
+	if err != nil {
+		return nil, servicePorts, err
+	}
+	pod.Spec.HostAliases = extraHost
+	return pod, servicePorts, nil
 }
 
 func (p *Pod) getInfraContainer() (*Container, error) {

test/e2e/generate_kube_test.go

@@ -151,6 +151,38 @@ var _ = Describe("Podman generate kube", func() {
 		Expect(numContainers).To(Equal(1))
 	})
 
+	It("podman generate kube on pod with hostAliases", func() {
+		podName := "testHost"
+		testIP := "127.0.0.1"
+		podSession := podmanTest.Podman([]string{"pod", "create", "--name", podName,
+			"--add-host", "test1.podman.io" + ":" + testIP,
+			"--add-host", "test2.podman.io" + ":" + testIP,
+		})
+		podSession.WaitWithDefaultTimeout()
+		Expect(podSession.ExitCode()).To(Equal(0))
+
+		ctr1Name := "ctr1"
+		ctr1Session := podmanTest.Podman([]string{"create", "--name", ctr1Name, "--pod", podName, ALPINE, "top"})
+		ctr1Session.WaitWithDefaultTimeout()
+		Expect(ctr1Session.ExitCode()).To(Equal(0))
+
+		ctr2Name := "ctr2"
+		ctr2Session := podmanTest.Podman([]string{"create", "--name", ctr2Name, "--pod", podName, ALPINE, "top"})
+		ctr2Session.WaitWithDefaultTimeout()
+		Expect(ctr2Session.ExitCode()).To(Equal(0))
+
+		kube := podmanTest.Podman([]string{"generate", "kube", podName})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube.ExitCode()).To(Equal(0))
+
+		pod := new(v1.Pod)
+		err := yaml.Unmarshal(kube.Out.Contents(), pod)
+		Expect(err).To(BeNil())
+		Expect(len(pod.Spec.HostAliases)).To(Equal(2))
+		Expect(pod.Spec.HostAliases[0].IP).To(Equal(testIP))
+		Expect(pod.Spec.HostAliases[1].IP).To(Equal(testIP))
+	})
+
 	It("podman generate service kube on pod", func() {
 		_, rc, _ := podmanTest.CreatePod("toppod")
 		Expect(rc).To(Equal(0))